Agricola, Georg - De re metallica Libri XII, Quibus Officia, Instrumenta, Machinae, ac omnia ...

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62[Figure 62]

Dixi de fornaculis & circulo ferreo, nunc dicam de tegula & catillis. Te
gula quidem eſt fictilis & imbricis inuerſi figura. Tegit aut catillos ne carbun
culi, in eos incidentes, experimentum impediant. Lata eſt ſeſquipalmum: al
titudine, quæ plerunque ſolet eſſe palmaris, reſpondet ori fornaculæ, longi
tudine ferè toti fornaculæ. Veruntamen priori tantum parte attingit os ei
us, alioqui undequaque à lateribus & poſteriori parte iccirco diſtat digitos
tres, ut carbones in medio loco, qui eſt inter ipſam & fornaculam iacere poſ
ſint. Habet uerò craſſitudinem ollæ fictilis bene craſſæ: ſed ſuperior eius pars
integra eſt, poſterior duas habet feneſtellas, & utrunque latus duas uel tres
uel etiam quatuor: per quas calor penetrans in catillos uenam excoquit: uel
loco feneſtellarum habet parua foramina: & poſteriori quidem parte decem,
in utroque uerò latere plura. Quinetiam poſterior pars ſub feneſtellis uel par
uis foraminib. ter exciſa eſt in modum ſemicirculi alti ſemidigitum: ſed latera,
quater. Poſterior autem tegulæ pars paulò minus alta eſſe ſolet quàm prior.

Tegulæ feneſtellæ latæ A. Angustæ B. Eiuſdem foramina poſterioris partis C.

63[Figure 63]

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